Enceladus in Silhouette: NASA's Cassini Captures Saturn's Icy Moon Backlit by the Sun

NASA's Astronomy Picture of the Day (APOD) for November 5, 2026, features Enceladus, Saturn's sixth-largest moon, in a dramatic silhouette against the Sun. The image, captured by the Cassini spacecraft, shows the moon's icy surface and towering plumes of water vapor backlit, revealing the fine particles ejected from its subsurface ocean. Enceladus is a prime target in the search for life beyond Earth, and this view highlights the dynamic geology of a world only 500 kilometers across. The silhouette emphasizes the moon's smooth, crater-free regions and the active south polar fractures known as 'tiger stripes,' from which the plumes erupt. Cassini's observations of these plumes, composed of water, salts, and organic molecules, suggest a habitable environment beneath the ice. This image serves as a reminder of the discoveries made by the Cassini mission, which ended in 2017, and the ongoing interest in future missions to Enceladus. The backlit perspective offers a unique glimpse into the processes that shape this distant ocean world.